Boom-derrick for hoisting and laying stone and other materials



JAMES S. SAVAGE, 0F BosroN,.MAssAoHUsErrs.

BOOM-DERRICK FOR I-IOISTING AND LAYINGr STONE AND OTHER MATERIALS.

Specification of Letters Patent No. 607, dated February 15, 1838.

i To all whom t may cof/@cem Be it known that I, JAMES S. SAVAGE, ofBoston, county of Suffolk and State of Massachusetts, have invented,made, and applied to use new and useful Improvements in Machines Usedfor IIoisting and Laying Stone and other Purposes, usually known by thename of Boom-Derricks,

The disposition, arrangement-and use of the several parts of theseimprovements, the principle thereof, and the several modes in which Ihave contemplated the application of that principle or character bywhich it may be distinguished from other inventions, together with thoseparts, improvements or combinations, which I claim as my inventions anddiscoveries, I have fully set forth and described in the followingspecification and annexed drawings.

Plate I represents a side elevation of the derrick, exhibiting themachinery, boom and hoisting ropes and guys. Plate II is the other sideview, taken at right angles to the plane of the boom and mast. Y

A, Plates l and 2, represents the mast and B the boom, constructed ofany suitable timber.

C is a platformY for the workmen to stand on while operatingthe derrick.

The frame work D D 'for supporting the barrels and machinery isconstructed as represented in the drawings, or in any other convenientmanner.

The lower end or foot of the boom B rests and turns in a step of metal aattached to the top of the framework D D.

On two oppositesides of the framework,

pinions b, c, on shafts d, e, revolving in proper bearings, connect withcogged wheels f, g, on shafts h, '11. Each of the shafts L, z' passesthrough barrels j, ,70, on which the operating ropes are wound, andunwound. Each of the shafts (l, e, hasa crank on each end thereof towhich the moving power is applied.

The platform C and framework thereon rest on the shoulder E, whichshoulder is formed round and attached to the lower part of the mast. Theframework D D and platform have suitable collars and washersr of metalbetween the same and the mast, to

ner; its object being to support the sheaves prevent wear of the parts,and facilitateI their operations.

A metallic hood or cap F, having a projecting rim or shoulder k isplaced on the top of the mast. Aro-und the hood or cap, the metallicsheave frame Gr moves. This frame may be constructed as represented inthe drawings, or in any other suitable man-- Z, m, and by means of theeye a, and ropes o or 79, to. support the boom B, and to sustain it at acertain angle of inclination.

` I-I is a circular vannulus or ring around the hood or cap F. This ringrests on a shoulder of the hood or cap F, and has three or more eyes g,g, 7,'aflixed to it, from which the guy ropes 1", i", r radiate todifferent points on the ground.

To the end of the boom B is hung the block s, which communicates withVthe block 25, to which the hook a is connected, which hooks into theeye of the lewis inserted in the block of stone to be raised. Betweenthe block g and hook u is a triangular shaped piece of metal o, to whichanother block w is attached. The rope for raising the stone passes fromthe barrel y' over the sheave l to aksheave in the end of the boom; fromthence, through the block t and s to the eye of the topl of the block t,

where it is fastened. The object of the other barrel k and its machineryis to draw the stone sidewise toward the mast, which it does by its ropepassing over' the sheave m; from thence under the sheave in the blockfwto the eye fr, to which theend is fastened.

The motion of the platform C around the mast, the machinery forhoistingthe stone, and that for drawing it sidewise toward the mast, togetherenable the workmen to place the stone in any desired situation with muchmore certainty and facility than by the ordinary boom derrick. y

Having herein described many parts ofA machinery generally used in theconstrucf tion of a hoisting apparatus of the above kind, together withother new and useful additions thereto, I claim as my inventions andimprovements- The combination of the whole machinery as above describedfor the purposeof hoistthis thirtieth day of January in the year ingstone or other bodies; and separately, I of our Lord one thousand eighthundred and J0 claim the second set of machinery and rope thirty seven.i

or ropes, to act on the stone or other body, JAMES S SAVAGE [L s] 5 anddraw it in a direction toward the mest.

In testimony that the above is a.v true Witnesses: i specification of mysaid inventions and im- R. I-I. EDDY, i provements, I have hereunto setmy hand OTIsTUrTs.

